package com.anquing.socket_netty;

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import io.netty.handler.codec.LengthFieldPrepender;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import io.netty.util.CharsetUtil;

/**
 *服务器端初始化
 *
 * @author wangquanqing
 * @since 2021/7/21 9:42 下午
 */
public class MyServerInitializer extends ChannelInitializer<SocketChannel> {

    @Override
    protected void initChannel(SocketChannel sc) throws Exception {

        ChannelPipeline pipeline = sc.pipeline();

        pipeline.addLast(new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE,0,4,0,4));
        pipeline.addLast(new LengthFieldPrepender(4));
        //字符串解码
        pipeline.addLast(new StringDecoder(CharsetUtil.UTF_8));
        //字符串编码
        pipeline.addLast(new StringEncoder(CharsetUtil.UTF_8));
        //自己定义的处理器
        pipeline.addLast(new MyServerHandler());

    }
}
